Without going into a long saga I have managed to buy a pc with out a floppy drive (very clever wording of an advert on ebay!!)
I was wondering about buying a USB floppy drive which I could then use to set the PC up but I was wondering can you use them to boot from? I know how to change the boot sequence in the bios if that is needed.
In your BIOS you should have an Advanced category. If you look in Advanced BIOS Features you should be able to find First, Second, Third boot device (perhaps more) which you can change to what you require by manipulating the up/down/sideways keys.
My detail might not be right for your motherboard but the general outline is.